数据概览的标题放在左上角；卡片大小调整；

src/views/PlatformData/UserOverview.vue

@@ -361,13 +361,14 @@ onMounted(() => {
 
 .big-card {
   flex: 1;
-  height: 260px;
+  height: 360px;
   border-radius: 12px;
   padding: 24px;
   display: flex;
   flex-direction: column;
-  justify-content: center;
+  justify-content: flex-start; /* 从顶部开始布局 */
   color: #fff;
+  position: relative; /* 确保绝对定位相对于卡片 */
 }
 .purple-gradient {
   background: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%);
@@ -382,7 +383,7 @@ onMounted(() => {
 }
 
 .right-stats-col {
-  flex: 1;
+  flex: 2;
   display: flex;
   flex-direction: column;
   gap: 20px;
@@ -393,21 +394,24 @@ onMounted(() => {
   padding: 20px;
   display: flex;
   flex-direction: column;
-  justify-content: center;
+  justify-content: flex-start; /* 改为从顶部开始布局 */
   color: #fff;
+  position: relative; /* 确保绝对定位相对于卡片 */
 }
 
 .card-title {
-  font-size: 20px;
+  font-size: 24px; /* 字体放大 */
+  font-weight: bold; /* 加粗 */
   display: flex;
   align-items: center;
   gap: 8px;
-  margin-bottom: 10px;
+  margin-bottom: 20px; /* 增加底部间距 */
+  width: 100%; /* 占满宽度 */
 }
 .card-value {
   font-size: 64px;
   font-weight: bold;
-  margin: 10px 0;
+  margin: auto 0; /* 垂直居中剩余空间 */
   text-align: center;
 }
 .card-value-small {